package collection;

import java.util.ArrayList;
import java.util.Collection;
/**
 * 集合间的操作: addAll()、containsAll()、retainAll()、removeAll()
 */
public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);   //c1:[java, c++, .net]
        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("Java");
        System.out.println("c2:"+c2);   //c2:[android, ios, Java]
        c1.addAll(c2);                  //将c2添加到c1
        System.out.println("c1:"+c1);   //c1:[java, c++, .net, android, ios, Java]
        System.out.println("c2:"+c2);   //c2:[android, ios, Java]
        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3:"+c3);   //c3:[c++, android, php]
        boolean contains = c1.containsAll(c3);  //判断c1是否包含c3中所有元素
        System.out.println("是否包含："+contains);//false

        //取交集：c1中仅保留与c3所共有的元素，而c3不变
        c1.retainAll(c3);
        System.out.println("c1："+c1);
        System.out.println("c3："+c3);
        //删交集：将1c1中与c3所共有的元素删除，而c3不变
        c1.removeAll(c3);
        System.out.println("c1："+c1);
        System.out.println("c3："+c3);
    }
}
